Ceiling-drilling machine.



H. G. CARLSON.

CEILING DRILLING MACHINE.

APPLICATION FILED NOV. I6. I914.

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- work, and particularly HJALMAR G. CARLSON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TQ ROSEWOOD SPRINKLER COMPANY OF MASSACHUSETTS, A CORPOTION OF MASSACHUSETTS.

cninme narrrme MACHINE.

Applicationfiled Itovmberlfi,v 1914. Serial No. 872,332.

Be. it known that I, HJALMAR G. QAnLsoN, a citizen of th'e United States, residing at Worcester, in the county of Worcester and 7 State of Massachusetts, have invented a new and useful Ceiling-Drilling Machine, of which the following is a'specification.

' This invention relates to a machine for use in buildings for thepurpose of performing drilling, tapping, and similar operations in the ceiling or in beams Or other overhead for use in steel frame buildings.

a The principal objects ofthe invention are to provide a simple, strong and rigid construction whereby an electric motor can be supported from the floor, and a tool, as for example a drill, tap or the like, firmly mounted at the top of the machine, can be moved up and down approximately to proper position and fixed in its adjustedpositions'; and means in connection therewith whereby the tool can .be fed upward by hand, and still be connected with-the motor at all times during the adjustment. In this way the proper feed can be provided and the-tool can be brought to proper position and yet it can be operated by the motor at I ing drawin the convenience of the operator,

Reference is to be had to the accompan inwhich, Figure 1 isa si e elevation o, a machine constructed in ac meshing with the rack and is also provided with a ratchet wheel 19. l A handle 20 is pivoted to swing on the shaft 17 and is provided with a: pawl 21 operated by a lever 22, whereby the handle can-be operated to turn the shaft 17 and thus raise and lower the rack 15 and slide 14. The slide can be fixed in its adjusted positions by means of a pivoted handle 23 which has a pawl engaging aratchet wheel 24 fixedto the shaft 17 for holding the slide in its adjusted positions. 1

On the top (if this slide is a gear casing 26. This is shown as formed in two parts secured together and inside the gear casing are two gears 27 and 28 meshing with each other. Through a square central hole in one of these gears freely passes a square shaft 29 so that it will turn with it. This shaft will drive the gears in all adjusted positions.

Patented May a, rare.

The shaft 29 constitutes the shaft of a motor 31, the casing of which is secured by bolts ina well known way. Set down into a recess therein is a round hollow casing 36 in the form of a pipe-which in this way is clamped. to the slide 14 and moves with it.

cordance with this invention with partsin In the upper end of this casing 36' is anwhich of course can be tightened to hold them in adjusted positions.

- The to of the pipe 12 screws into the bottom 0 a frame 13 which has a vertical passage up through it. In this vertical passage 1s a feed slide 14 which is provided with a rack 15. The frame 13 has ears '16 thereon provided with bearings for a horizontal shaft17. This shaft hasapinion 18 other circular hollow casing 38 secured by a split clamp 37. The clamp is .desi ed to clamp these two casings together al th r adjustment. I At the top ofthe casing 38 is ahead 39 fixed to it and provided with a ball rest for a set of bearing balls 40. Resting on the bearing balls is a cone 41 adapted to be tightened downin position by a collar 42 which has spanner holes, as indicated. This collar screws into the enlarged upper head 39. Resting on the (zone 41 is the tool-head 43 designed for receiving the drill 44, tap or other tool to be operated. At the bottom,

of the pipes 11 and 12 and secured in its difierent adjusted positions. Furthermore, the two casings 36 and 38 can be adjusted so as to brin the tool into a position so that upon being ed upwardly by the handle it will perfornf the desired operation in the eration the gears 27 and 28 move up to conceiling or the like. During the-feeding 0ptinue to transmit power to thetool.

It has been found in practice that this machine saves a great deal of time in the drilling of holes of the character mentioned,

and in performing other similar operations.

It also furnishes a rigid construction and provides a firm bearing for the tool head at a point near the base of the tool.

Although I have illustrated and described a particular embodiment of the invention, I am aware ofthe fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in-the claims. Therefore, I do not wish to be limited to all the details of construction herein shown vand described,but V I 'What I do claim is:. v

1. in a tool of the character described, the combination of a frame, a shaft supported by said frame and extending upwardly therefrom, a telescoping casing movable withsaid frame and having means for carrying a tool head at the top, means for transmitting power to said shaft in all positions of the shaft, means in the casing for transmitting power to the tool head from the shaft in all positions of the casing, and means on. the frame for raising and lowering the shaft.

2. In a tool of the character described, the combination of a base adapted to rest on the door, a frame mounted on said base, a motor on the frame, a shaft supported by said frame and extending upwardly therefrom, a

telescoping casing movable with said frame and having means 'for carrying a tool head.

at the top, means for transmitting power from the'motor to said shaft in all positions of the shaft, means in the casing for transmitting power to the tool head from the shaft in all positions of the casing, and means on the frame for raising and lowering the shaft,

3. In a machine of the character described, the combination of a frame, a motor carried by the frame, a vertical shaft extending from the top of the motor, a slide carried by said frame and vertically movable therein, means'on the frame for moving the slide up and down, a gear casing earned by said slide and movable therewith, two gears in means? said casing meshing with each other, one of them turning with the motor shaft in all positions of the frame, and a tool shaft ex top, a vertically movable slide carried by the frame, means for raising and lowering said slide by hand, a pair 'of gears carried by said slide, one being connected with said motor shaft in all positions of the slide, a shaft connected with the other gear to trans mit power therefrom and extending. vertic-ally from the top of the slide, a tool head mounted above the top of said shaft, and adjustable means for connecting said tool head and shaft to cause the tool head to be turned by the shaft.-

\ 5. In a machine of the character described,

- upwardly from the top of said slide and fixed thereto, a hollow cylindrical casing carried inside the "first named casing and telescoping therewith, means for securing said casings in adjusted positions, a hollow square shaft inside the hollow cylindrical casings for receiving the first named square.

shaft and transmitting power therefrom,

and a tool head at the top having a square shaft entering said hollow shaft and receiving power therefrom.

6. In a machine of the character described,

the combination of a frame, a motor carried thereby, a slide vertically movable on the frame, a square shaft extending upwardly from the top of'said slide, means carriedby said slide for connectipg the motor with said square shaft in all positions of the slide, a hollow casing extending upwardly from the top of said slide and fixed thereto,

a hollow casing carried inside the first named casing and telescoping therein, meansfor securing said casings in adjusted positions, a'hollow square shaft inside the hollow, casings for receiving the first named square shaft and transmitting power there. from, and a tool head at the top having a square shaft entering the top of said hollow shaft and receiving power therefrom, said tool head having-a ball cone at the bottom thereof and said'inner casing being provided with a head at the topfthereof having a ball rest, and a set of bearing balls therein for supporting the said coneand tool head.

7. In a machine of the character described, the combination of a frame, a slide verti-- cally movable on the frame, a shaft extend- 13 merges? ing upwardly from said slide, a hollow casing extending upwardly from said slide, a hollow casing carried inside the first named casing and telescoping therein, means for securing said casings in adjusted positions, means for receiving the shaft and transmitting power therefrom, and a tool head at' the top having means for receiving power therefrom, said tool head having a hall cone at the bottom thereof and said inner casing being provided with ahead at the top thereof having a ball rest, and a set of bearing balls therein for supporting the said cone and tool head.

8. In a machine of the character described,

the combination of a frame, a feed slide vertically movable thereon, a telescopically adjustable casing extending upwardly from the slide, a head on the top of said casing,

a tool head having a bearing in the first named head, and means extending up through the casing for rotating the tool head from below the casing in all adjusted positions thereof.

9. In a machine of the character described, the combination of a frame, a slide vertically movable on the frame, a square shaft extending upwardly fromthe top of said slide, a hollow cylindrical casing extending upwardly from the top of said slide and HJALMAR G. CARLSQN.

l Vitnesses:

H. CLAYTON KnNnAim, Gnoncn A. 

